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; RUN: opt < %s -passes='require<loops>,gvn' -S | FileCheck %s
; This test is checking that (a) this doesn't crash, and (b) we don't
; conclude the value of %tmp17 is available in bb1.bb15_crit_edge.
; rdar://9429882
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
target triple = "x86_64-apple-macosx10.7.0"
define i1 @rb_intern(ptr %foo) nounwind ssp {
; CHECK-LABEL: @rb_intern(
bb:
%tmp = alloca ptr, align 8
store ptr null, ptr %tmp, align 8
store i8 undef, ptr null, align 536870912
br label %bb1
bb1:
br i1 undef, label %bb3, label %bb15
; CHECK: bb1:
; CHECK: [[TMP:%.*]] = phi ptr [ %tmp14, %bb10 ], [ null, %bb ]
; CHECK: bb1.bb15_crit_edge:
; CHECK: %tmp17.pre = load i8, ptr [[TMP]], align 1
bb3:
call void @isalnum()
br i1 undef, label %bb10, label %bb5
bb5:
br i1 undef, label %bb10, label %bb6
bb6:
%tmp7 = load ptr, ptr %tmp, align 8
%tmp8 = load i8, ptr %tmp7, align 1
%tmp9 = zext i8 %tmp8 to i64
br i1 undef, label %bb15, label %bb10
bb10:
%tmp11 = load ptr, ptr %tmp, align 8
%tmp12 = load i8, ptr %tmp11, align 1
%tmp13 = zext i8 %tmp12 to i64
%tmp14 = getelementptr inbounds i8, ptr %foo, i64 undef
store ptr %tmp14, ptr %tmp, align 8
br label %bb1
bb15:
%tmp16 = load ptr, ptr %tmp, align 8
%tmp17 = load i8, ptr %tmp16, align 1
%tmp18 = icmp eq i8 %tmp17, 0
br label %bb19
; CHECK-LABEL: bb6:
; CHECK: br i1 undef, label %bb15split, label %bb10
; CHECK-LABEL: bb15split: ; preds = %bb6
; CHECK-NEXT: br label %bb15
; CHECK-LABEL: bb15:
; CHECK: %tmp17 = phi i8 [ %tmp12.pre3, %bb15split ], [ %tmp17.pre, %bb1.bb15_crit_edge ]
bb19: ; preds = %bb15
ret i1 %tmp18
}
declare void @isalnum() nounwind inlinehint ssp
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